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प्रश्न
The best way to recover sugar from an aqueous sugar solution is :
पर्याय
evaporation to dryness
distillation
filtration
crystallisation
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उत्तर
crystallisation
Crystallisation is a better technique to recover sugar from sugar solution because sugar decomposes or gets charred on heating. Also, the soluble impurities get removed by crystallisation.
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संबंधित प्रश्न
What are the two conditions for the interconversion of states of matter ?
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
Name a non-metal which is a good conductor of electricity.
Name the property which allows metals to be hammered into thin sheets.
Which of the two will scatter light : soap solution or sugar solution ? Why ?
State whether colloidal solutions are homogeneous or heterogeneous.
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
How will you differentiate between a suspension and a colloid ?
Define solubility of a substance. How does it vary with temperature ?
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
How is cream separated from milk ?
Name one pair of liquids which can be separated by using a separating funnel.
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
 |
 |
 |
The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
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- Which one can take the shape of its container?
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Atoms or groups of atoms having a charge are called ______.
Solids possess very high kinetic energy.
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
Give an example of a molecule.
Define the term matter.
